12866745540 has 144 divisors (see below), whose sum is σ = 39825051840. Its totient is φ = 3101472000.

The previous prime is 12866745503. The next prime is 12866745611. The reversal of 12866745540 is 4554766821.

It is a super-2 number, since 2×12866745540² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12866745540.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1294590 + ... + 1304490.

It is an arithmetic number, because the mean of its divisors is an integer number (276562860).

Almost surely, 2^12866745540 is an apocalyptic number.

12866745540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12866745540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19912525920).

12866745540 is an abundant number, since it is smaller than the sum of its proper divisors (26958306300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12866745540 is a wasteful number, since it uses less digits than its factorization.

12866745540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10114 (or 10101 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 12866745540 in words is "twelve billion, eight hundred sixty-six million, seven hundred forty-five thousand, five hundred forty".